# want to compute zero mean for whole matrix and then some scaling to this ?

1 view (last 30 days)

Show older comments

I have a matrix of 1024*966 for this matrix I want to compute zero mean and want to scale after this and want to improve result by doing this but how can I? Final result will be nearly equal result to matrix of 1024*966.

for zero mean I got

X=AC1(:,1);

Y=X-mean(X(:,:));

For scaling I don't know?

##### 1 Comment

the cyclist
on 29 Aug 2013

### Answers (1)

Image Analyst
on 29 Aug 2013

Edited: Image Analyst
on 29 Aug 2013

You should have edited your original question, or added a comment to my answer there.

Why do you call it zero mean? That's not standard terminology. Why are you taking only the left column of 2D image AC1? That doesn't do the whole matrix, just the left column. Anyway, you can do

Y = double(AC1) - mean2(AC1); % Use mean(AC1(:)) if you don't have the IPT.

For scaling just multiply by some scaling factor, like 42 or whatever - I'm not sure why that part is confusing to you.

##### 6 Comments

Image Analyst
on 18 Sep 2013

I still don't understand. Did you switch terminology on us? Is your new x the old z (the plane number, or 1,2,3) and the new y is the pixel value at that (x,y) location in the three matrices?

Since you've lost me, why don't you just use polyfit() to get your parabola?

coefficients = polyfit(x, y, 2);

### See Also

### Categories

### Products

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!